/* ============================================================
 * form.css — 賞状の間 ご注文フォーム専用スタイル
 * Phase 2: UI/UX改善
 *
 * 注意: 賞状の間では html { font-size: 62.5% } で 1rem = 10px。
 * sjn-form 内は font-size: 16px をセットし、
 * 全サイズ指定は px または em（親要素相対）を使用。
 * ============================================================ */

/* ── CSS Custom Properties ── */
:root {
  --form-bg: #faf8f5;
  --form-card-bg: #ffffff;
  --form-border: #e0dbd4;
  --form-border-focus: #8b2332;
  --form-accent: #8b2332;
  --form-accent-light: #f5ece8;
  --form-accent-hover: #6e1a27;
  --form-text: #333333;
  --form-text-light: #777777;
  --form-error: #c41e3a;
  --form-error-bg: #fef2f4;
  --form-success: #2e7d32;
  --form-radius: 8px;
  --form-radius-sm: 4px;
  --form-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  --form-shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.1);
  --form-transition: 0.25s ease;
  --form-font:
    "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
}

/* ── フォーム全体ラッパー ── */
.sjn-form {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 16px;
  font-family: var(--form-font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--form-text);
  text-align: left;
}

/* sjn-form内の全要素のfont-sizeを継承ベースにリセット */
.sjn-form *:not(h1):not(h2):not(h3):not(h4) {
  font-size: inherit;
}

/* ── 冒頭メッセージ ── */
.sjn-form__hero {
  background: linear-gradient(
    135deg,
    var(--form-accent-light) 0%,
    var(--form-card-bg) 100%
  );
  border-radius: var(--form-radius);
  padding: 28px 24px;
  margin-bottom: 32px;
  text-align: center;
  border: 1px solid rgba(139, 35, 50, 0.12);
}

h2.sjn-form__hero-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--form-accent);
  margin: 0 0 10px;
  letter-spacing: 0.02em;
}

.sjn-form__hero-desc {
  font-size: 15px;
  color: var(--form-text-light);
  margin: 0;
  line-height: 1.7;
}

.sjn-form__hero-badges {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.sjn-form__hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--form-accent);
  background: var(--form-card-bg);
  border: 1px solid var(--form-border);
  border-radius: 20px;
  padding: 6px 14px;
}

.sjn-form__hero-badge::before {
  content: "✓";
  font-weight: 700;
  font-size: 12px;
}

/* ── エラーボックス ── */
.sjn-form__errors {
  background: var(--form-error-bg);
  border: 2px solid var(--form-error);
  border-radius: var(--form-radius);
  padding: 20px 24px;
  margin-bottom: 24px;
}

.sjn-form__errors-title {
  color: var(--form-error);
  font-weight: 700;
  font-size: 15px;
  margin: 0 0 10px;
}

.sjn-form__errors-list {
  color: var(--form-error);
  margin: 0;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.8;
}

/* ── フォームブロック（カード型セクション） ── */
.sjn-form__block {
  background: var(--form-card-bg);
  border: 1px solid var(--form-border);
  border-radius: var(--form-radius);
  box-shadow: var(--form-shadow);
  margin-bottom: 24px;
  overflow: hidden;
  transition: box-shadow var(--form-transition);
}

.sjn-form__block:hover {
  box-shadow: var(--form-shadow-hover);
}

.sjn-form__block-header {
  background: var(--form-accent);
  color: #fff;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.sjn-form__block-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  font-weight: 700;
  font-size: 15px;
  flex-shrink: 0;
}

.sjn-form__block-title {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.sjn-form__block-subtitle {
  font-size: 13px;
  opacity: 0.8;
  margin-left: auto;
}

.sjn-form__block-body {
  padding: 24px;
}

/* ── フィールドグループ ── */
.sjn-field {
  margin-bottom: 20px;
}

.sjn-field:last-child {
  margin-bottom: 0;
}

.sjn-field__label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--form-text);
  margin-bottom: 8px;
}

.sjn-field__badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--form-radius-sm);
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

.sjn-field__badge--required {
  background: var(--form-error);
  color: #fff;
}

.sjn-field__badge--optional {
  background: #6b7280;
  color: #fff;
}

.sjn-field__hint {
  font-size: 13px;
  color: var(--form-text-light);
  margin-top: 6px;
  line-height: 1.5;
}

/* ── 入力要素共通 ── */
.sjn-input,
.sjn-select,
.sjn-textarea {
  width: 100%;
  padding: 12px 14px;
  font-size: 16px;
  font-family: var(--form-font);
  color: var(--form-text);
  background: var(--form-bg);
  border: 1px solid var(--form-border);
  border-radius: var(--form-radius-sm);
  transition:
    border-color var(--form-transition),
    box-shadow var(--form-transition);
  box-sizing: border-box;
  appearance: none;
  -webkit-appearance: none;
}

.sjn-input:focus,
.sjn-select:focus,
.sjn-textarea:focus {
  outline: none;
  border-color: var(--form-border-focus);
  box-shadow: 0 0 0 3px rgba(139, 35, 50, 0.12);
}

.sjn-input::placeholder {
  color: #bbb;
  font-size: 14px;
}

.sjn-input--short {
  max-width: 200px;
}

.sjn-input--medium {
  max-width: 360px;
}

.sjn-input--half {
  max-width: 280px;
}

.sjn-field__inline {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sjn-field__spacing {
  margin-top: 12px;
}

.sjn-textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.7;
}

.sjn-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23777' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* ── ラジオボタン・チェックボックス ── */
.sjn-radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.sjn-radio-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  background: var(--form-bg);
  border: 1px solid var(--form-border);
  border-radius: var(--form-radius-sm);
  cursor: pointer;
  font-size: 15px;
  transition: all var(--form-transition);
  user-select: none;
}

.sjn-radio-label:hover {
  border-color: var(--form-accent);
  background: var(--form-accent-light);
}

.sjn-radio-label input[type="radio"]:checked + span,
.sjn-radio-label:has(input[type="radio"]:checked) {
  color: var(--form-accent);
}

.sjn-radio-label:has(input[type="radio"]:checked) {
  border-color: var(--form-accent);
  background: var(--form-accent-light);
  font-weight: 600;
}

.sjn-radio-label input[type="radio"] {
  accent-color: var(--form-accent);
  width: 16px;
  height: 16px;
}

/* ── 住所フィールド ── */
.sjn-address-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sjn-address-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sjn-address-row__label {
  flex-shrink: 0;
  font-size: 14px;
  color: var(--form-text-light);
  min-width: 70px;
}

/* ── 住所検索ボタン ── */
.sjn-btn--zip-search {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  font-family: var(--form-font);
  color: #fff;
  background: var(--form-accent);
  border: none;
  border-radius: var(--form-radius-sm);
  cursor: pointer;
  transition: all var(--form-transition);
  white-space: nowrap;
  flex-shrink: 0;
}

.sjn-btn--zip-search:hover {
  background: var(--form-accent-hover);
}

.sjn-btn--zip-search:disabled {
  background: var(--form-border);
  cursor: not-allowed;
}

/* ── 送信ボタン ── */
.sjn-form__actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin: 40px 0 20px;
  flex-wrap: wrap;
}

.sjn-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 48px;
  font-size: 16px;
  font-weight: 700;
  font-family: var(--form-font);
  border: none;
  border-radius: var(--form-radius);
  cursor: pointer;
  transition: all var(--form-transition);
  letter-spacing: 0.05em;
}

.sjn-btn--primary {
  background: var(--form-accent);
  color: #fff;
  box-shadow: 0 4px 12px rgba(139, 35, 50, 0.3);
}

.sjn-btn--primary:hover {
  background: var(--form-accent-hover);
  box-shadow: 0 6px 20px rgba(139, 35, 50, 0.4);
  transform: translateY(-1px);
}

.sjn-btn--secondary {
  background: var(--form-bg);
  color: var(--form-text-light);
  border: 1px solid var(--form-border);
}

.sjn-btn--secondary:hover {
  background: #f0ede8;
  color: var(--form-text);
}

.sjn-btn--send {
  background: var(--form-accent);
  color: #fff;
  padding: 18px 64px;
  font-size: 18px;
  box-shadow: 0 4px 16px rgba(139, 35, 50, 0.35);
}

.sjn-btn--send:hover {
  background: var(--form-accent-hover);
  box-shadow: 0 6px 24px rgba(139, 35, 50, 0.45);
  transform: translateY(-2px);
}

/* ── 確認画面 ── */
.sjn-confirm__section-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--form-accent);
  letter-spacing: 0.08em;
  margin: 0 0 20px;
  padding: 10px 16px;
  background: var(--form-accent-light);
  border-left: 3px solid var(--form-accent);
  border-radius: 0 var(--form-radius-sm) var(--form-radius-sm) 0;
}

.sjn-confirm__section-title:not(:first-child) {
  margin-top: 8px;
}

.sjn-confirm__list {
  margin: 0 0 20px;
  padding: 0;
}

.sjn-confirm__list dt {
  font-size: 13px;
  font-weight: 600;
  color: var(--form-text-light);
  padding: 16px 16px 4px;
  border-top: 1px solid var(--form-border);
}

.sjn-confirm__list dt:first-child {
  border-top: none;
}

.sjn-confirm__list dd {
  font-size: 16px;
  font-weight: 500;
  color: var(--form-text);
  margin: 0;
  padding: 4px 16px 12px;
  line-height: 1.7;
}

.sjn-form__actions {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin: 24px 0 32px;
}

/* ── ハニーポット ── */
.sjn-honeypot {
  position: absolute;
  left: -9999px;
  top: -9999px;
}

/* ── サブセクション ── */
.sjn-subsection {
  padding-bottom: 24px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--form-border);
}

.sjn-subsection:last-child {
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 0;
}

.sjn-subsection__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--form-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 20px;
  padding: 10px 16px;
  background: var(--form-accent-light);
  border-left: 3px solid var(--form-accent);
  border-radius: 0 var(--form-radius-sm) var(--form-radius-sm) 0;
  line-height: 1.4;
  text-align: left;
}

/* ── チェックボックス ── */
.sjn-checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 14px;
  color: var(--form-text);
  padding: 10px 16px;
  border: 1px solid var(--form-border);
  border-radius: var(--form-radius-sm);
  background: var(--form-card-bg);
  transition: all var(--form-transition);
}

.sjn-checkbox-label:hover {
  border-color: var(--form-accent);
  background: var(--form-accent-light);
}

.sjn-checkbox-label input[type="checkbox"] {
  display: none;
}

.sjn-checkbox-label__box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border: 2px solid var(--form-border);
  border-radius: 3px;
  background: #fff;
  transition: all var(--form-transition);
  flex-shrink: 0;
}

.sjn-checkbox-label__box::after {
  content: "";
  display: block;
  width: 5px;
  height: 9px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
  opacity: 0;
  transition: opacity 0.15s ease;
}

.sjn-checkbox-label input[type="checkbox"]:checked + .sjn-checkbox-label__box {
  background: var(--form-accent);
  border-color: var(--form-accent);
}

.sjn-checkbox-label
  input[type="checkbox"]:checked
  + .sjn-checkbox-label__box::after {
  opacity: 1;
}

/* ── カレンダーUI ── */
.sjn-calendar {
  background: var(--form-card-bg);
  border: 1px solid var(--form-border);
  border-radius: var(--form-radius);
  overflow: hidden;
  max-width: 380px;
}

.sjn-calendar__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--form-accent-light);
  border-bottom: 1px solid var(--form-border);
}

.sjn-calendar__month {
  font-size: 15px;
  font-weight: 700;
  color: var(--form-text);
}

.sjn-calendar__nav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--form-border);
  border-radius: 50%;
  background: var(--form-card-bg);
  color: var(--form-text);
  font-size: 18px;
  cursor: pointer;
  transition: all var(--form-transition);
  font-family: var(--form-font);
  line-height: 1;
  padding: 0;
}

.sjn-calendar__nav:hover:not(:disabled) {
  background: var(--form-accent);
  color: #fff;
  border-color: var(--form-accent);
}

.sjn-calendar__nav:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.sjn-calendar__weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  text-align: center;
  padding: 8px 4px;
  border-bottom: 1px solid var(--form-border);
  background: var(--form-bg);
}

.sjn-calendar__weekdays span {
  font-size: 12px;
  font-weight: 600;
  color: var(--form-text-light);
  padding: 4px 0;
}

.sjn-calendar__weekdays span:first-child {
  color: #c41e3a;
}

.sjn-calendar__weekdays span:last-child {
  color: #1565c0;
}

.sjn-calendar__grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
  padding: 8px 4px;
}

.sjn-calendar__day {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  aspect-ratio: 1;
  border: none;
  border-radius: 50%;
  background: transparent;
  font-size: 14px;
  font-family: var(--form-font);
  color: var(--form-text);
  cursor: pointer;
  transition: all 0.15s ease;
  padding: 0;
  position: relative;
}

.sjn-calendar__day:hover:not(:disabled):not(.sjn-calendar__day--empty) {
  background: var(--form-accent-light);
  color: var(--form-accent);
}

.sjn-calendar__day--empty {
  cursor: default;
}

.sjn-calendar__day--disabled {
  color: #ccc;
  cursor: not-allowed;
}

.sjn-calendar__day--sun:not(.sjn-calendar__day--disabled) {
  color: #c41e3a;
}

.sjn-calendar__day--sat:not(.sjn-calendar__day--disabled) {
  color: #1565c0;
}

.sjn-calendar__day--today::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--form-accent);
}

.sjn-calendar__day--selected {
  background: var(--form-accent) !important;
  color: #fff !important;
  font-weight: 700;
  box-shadow: 0 2px 6px rgba(139, 35, 50, 0.3);
}

.sjn-calendar__day--selected::after {
  display: none;
}

.sjn-calendar__selected {
  font-size: 14px;
  margin: 10px 0 0;
  min-height: 1.5em;
}

/* ── ステップナビ：プログレスバー ── */
.sjn-stepper {
  margin-bottom: 28px;
}

.sjn-stepper__track {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 0 16px;
}

.sjn-stepper__step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.sjn-stepper__dot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--form-border);
  color: var(--form-text-light);
  font-weight: 700;
  font-size: 14px;
  transition: all 0.3s ease;
}

.sjn-stepper__step.is-active .sjn-stepper__dot {
  background: var(--form-accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(139, 35, 50, 0.3);
}

.sjn-stepper__step.is-done .sjn-stepper__dot {
  background: var(--form-accent);
  color: #fff;
  opacity: 0.7;
}

.sjn-stepper__label {
  font-size: 12px;
  color: var(--form-text-light);
  text-align: center;
  transition: color 0.3s ease;
  white-space: nowrap;
}

.sjn-stepper__step.is-active .sjn-stepper__label {
  color: var(--form-accent);
  font-weight: 600;
}

.sjn-stepper__step.is-done .sjn-stepper__label {
  color: var(--form-accent);
  opacity: 0.7;
}

.sjn-stepper__line {
  flex: 1;
  height: 3px;
  background: var(--form-border);
  margin: 0 8px;
  margin-bottom: 22px;
  border-radius: 2px;
  transition: background 0.3s ease;
  min-width: 40px;
}

.sjn-stepper__line.is-done {
  background: var(--form-accent);
  opacity: 0.7;
}

/* ── ステップ表示制御 ── */
.sjn-step {
  display: none;
  animation: sjnFadeInUp 0.35s ease both;
}

.sjn-step.is-visible {
  display: block;
}

@keyframes sjnFadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── ステップ内ナビボタン ── */
.sjn-step__nav {
  display: flex;
  justify-content: center;
  gap: 16px;
  padding: 20px 24px;
  border-top: 1px solid var(--form-border);
}

/* ── レスポンシブ ── */
@media (max-width: 768px) {
  .sjn-form {
    padding: 0 12px;
  }

  .sjn-form__hero {
    padding: 24px 20px;
  }

  .sjn-form__hero-title {
    font-size: 20px;
  }

  .sjn-form__block-header {
    padding: 14px 18px;
  }

  .sjn-form__block-body {
    padding: 18px;
  }

  .sjn-radio-group {
    flex-direction: column;
  }

  .sjn-radio-label {
    width: 100%;
  }

  .sjn-address-row {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }

  .sjn-btn {
    width: 100%;
    padding: 16px 32px;
  }

  .sjn-form__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .sjn-btn--send {
    font-size: 17px;
    padding: 18px;
  }

  .sjn-stepper__track {
    padding: 0 8px;
  }

  .sjn-stepper__dot {
    width: 30px;
    height: 30px;
    font-size: 13px;
  }

  .sjn-stepper__label {
    font-size: 11px;
  }

  .sjn-stepper__line {
    min-width: 24px;
  }

  .sjn-step__nav {
    flex-direction: column;
    align-items: stretch;
  }
}

/* 確認画面の洗練化 */
.sjn-confirm__list {
  display: grid;
  grid-template-columns: 160px 1fr; /* ラベルの幅を固定 */
  gap: 16px 24px;
  text-align: left; /* 必須：左揃え */
}

.sjn-confirm__list dt {
  border-top: none; /* 既存のボーダーをリセット */
  padding: 0;
  color: var(--form-text-light);
  font-weight: 600;
  font-size: 14px;
}

.sjn-confirm__list dd {
  padding: 0;
  margin: 0;
  border-bottom: 1px solid var(--form-border); /* 下線で区切る */
  padding-bottom: 16px;
  font-size: 16px;
  color: var(--form-text);
}

/* フォームフィールド全体のゆとり */
.sjn-field {
  margin-bottom: 28px; /* 20pxから少し広げて息継ぎさせる */
}

/* ラジオボタンの洗練 */
.sjn-radio-label {
  padding: 12px 20px; /* タップ領域を広げる */
  border: 1px solid var(--form-border);
  border-radius: 6px; /* 少し丸みを足す */
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02); /* 極薄の影で立体感 */
}

.sjn-radio-label:has(input[type="radio"]:checked) {
  border-color: var(--form-accent);
  background: var(--form-accent-light); /* ほんのり色付くのは非常に良いです */
  box-shadow: 0 0 0 1px var(--form-accent); /* 枠線を太く見せる擬似フォーカス */
}